Kakslauttanen, about 5 km northwest of Saariselkä village, is the original Finnish glass igloo resort and still the most famous. The thermal glass domes let you lie in bed watching the Northern Lights without getting cold, and the resort also runs traditional log cabins, snow igloos, and one of the world's largest smoke saunas.
Even if you are not staying here, the resort offers day visits to a reindeer farm, husky kennels, and short snowshoe excursions in winter. Book glass igloos months ahead for peak aurora season (December to March).